Water quality monitoring stations are deployed at the Preserve: one in the Tualatin River and one in a the Jackson Bottom Slough. The water quality monitoring probes measure these parameters:
A water quality monitoring station is deployed in the Tualatin River at the Highway 219 bridge. The station is solar-powered and uses a Campbell Scientific data logger that is connected to probes in the water. The probes are a YSI multi-parameter water quality probe and a water level sensor. Water quality data are measured and transmitted hourly to the base computer using wireless telemetry (900 MHz license-free spectrum).
The YSI probes measure pH, temperature, dissolved oxygen, electrical conductivity and turbidity (river only). The level sensor measures the water level by comparing the water pressure with the atmospheric pressure. A Greenspan water level sensor is used.